Pendulum ball for automatic scales



L. H. KENNEDY,

PENDULUM BALL .FOB AUTOMATIC'SCALES.

Patented May 30 1922.

APPLICATION FILED FEB. 14. 1921.

INVENTOR WITNESS:

.44; ATTORNEY.

LAWRENCE I-I. KENNEDY,

or DAYTON, OHIO.

PENDULUM BALL 50R- AUTOMATIO SCALES.

Application filed February 14, 1921.

T 0 (ZZZ whom e'z m-ay concern: 1

Be it known that I, Lswnnncn H. KEN- Nnnr, a citizen of the United States, residing at Dayton, in the county of h lontgoscry and State of Ohio, have invented certain new and useful Improvements in Pendulum Balls for Automatic Scales, of which. the following is a specification.

The principal object of my invention is to provide for automatic dial scales, an upper pendulum ball that permits of a very minute adjustment. A scale equipped with my improved pendulum ball may be set up at the factory and in the field with a great saving of time. A more minute and accurate adjustment of the scale is also made possible with my adjustable upper pendulum ball.

Other important and incidental objects will be brought out in the following specification, and particularly set forth in the subjoined claims.

In the accompanying drawings, Figure 1 is a rear view of a platform scale equipped with my improved upper pendulum hall. Figure 2 is a front elevational view of said ball. And Figure '3 is a top plan view thereof.

Referring to the accompanying drawings for a detailed description of the preferred form of embodiment of my invention, the numeral 1 designates the frame of an auto-- matic dial scale, the head 2 of which supports a dial 3.

Supported by the head 2 of the frame 1 is a bracket 4 to which is secured a pendulum chair 5 which supports a fulcrum pivot 6 for a pendulum arm 7 of the ordinary type. (See Figure 1.) Adjustably secured on the lower end of the arm 7 is an upper pendulum ball 8 constructed as follows:

Referring to Figures 2 pendulum ball 8 consists of a cylindrical casting having an elongated flat top portion 9 and an elongated flat bottom portion 10. The cylindrical casting 8 has a hollow interior which is preferably rectangular in cross section, with the vertical. side walls 11, 11 of greater length than the top and bottom walls 12 and 13 respectively.

A rectangular hole 14 is provided in the flat top portion 9 of the ball 8 to receive the lower end of the pendulum arm 7. The latter has a threaded stem portion 15 which projects downwardly through a circular hole and 3, the upper Specification of Letters Patent.

Patented May 30, 1922. Serial No. 444,882.

.16 provided in the bottom flat portion 10 of the ball casting. A nut 17 is applied to the bottom of the threaded stem portion 15 of the pendulum arm 7', to support the ball 8 whose flat bottom portion 10 rests upon the nut. By turning the latter, the ball 8 may be moved along the pendulum arm 7 to ad; just its position with reference to the fulcrum pivot 6. i

In order to obtain a more minute and accurate adjustment of the pendulum ball 8, the following means are provided. Vertically slidable in the hollow interior portion of the ball casting, is a rectangular adjustment block 18. Threaded through the middle portion of the latter is an adjustment screw 19 which projects upwardly through a round hole 20 in the top portion 9 of the ball casting, terminating in a knurled head 21 by means of which said screw may be turned to impart to the block an upward or downward movement. The adjustment screw 19 has a reduced stem portion 22 which passes through a hole in the bottom portion 10 of the ball casting to receive on its outer end a nut 23. Secured to the front portion of the adjustment block 18 by means of screws 24, 24 is an adjustment indicator 25 whose outer pointed end travels over a graduated plate. 26 secured to the face portion of the ball casting 8 by screws 27. 27. This plate con tains a vertical series of horizontal division lines 28 spaced an equal distance apart.

he division lines 28 on the plate 26 are so calibrated with regard to the division lines on the dial 3 that if. when adjusting the scale, the capacity of the dial is one division short, the adjustment block 18 may be moved upwardly by turning the screw 19, a distance equal to the space between two of the division lines 28 on the plate 26. In other words, the adjustment block 18 will be moved toward the top of the ball casting a distance equal to that traveled by the pointed end of the indicator in moving between one line 28 and the line immediately above it. ()n the other hand, if the capacity of the dial is one division fast, the adjustment block 18 'is moved downwardly within the ball casting a distance equal to that traveled by the pointed end of the indicator 25 in moving from one line 28 to the line immediately below it.

It is thus possible by turning the screw 19 to adjust the vertical position of the block 18 within the ball casting S to make the latter heavier or lighter at the bottom so that it will. require a greater or less force to 'aise it, which is equivalent to mounting pendulum. balls of varying weights on the pendulum arm 7. \Vithout removing the pendulum ball from, or moving it along, the pendulum arm 7. it is possible by my improved adj Listing means to obtain a very minute and accurate adjustment of the scale, and with. a great saving oi time.

By means of a set screw projecting through one side wall. of the ball. casting for engagement with the adjustment block 18 the latter may be held in its adjusted position. Similarly, by means of a set screw 1-30 projecting through the top portion of the ball casting "for engagement with the pendulum arm 7, the ball casting itself may be securely held in an adjusted position on the latter.

Having described my invention, 1 claim:

1. A pendulum ball for automatic scales comprising a casting having a hollow interior portion rectangular in cross section. and adjustable means slidable through said interior portion along its major for the purpose specified.

2. A pendulum ball for automatic scales, comprising a casting: having; a hollow interior portion rectangular in cross section. and a vertically-adjustable block slidable through said interior portion along its major axis for the purpose specified.

3. A pendulum hall for automatic comprising a casting having a hollow interior portion, a vertically-movable block within its interior portion, a gradiuited member on said casting, and an indicator carried by said block movable over the graduations on said member for the purpose specified.

In testimony whereof I have hereunto set my hand this 12th day of February, 1921.

scales.

LA\VRENG.E H. KENNEDY. Witness:

HowARn S. SMITH. 

